diff --git a/libs/core/langchain_core/language_models/fake_chat_models.py b/libs/core/langchain_core/language_models/fake_chat_models.py
index d683fbdac34..4d3fa5d6649 100644
--- a/libs/core/langchain_core/language_models/fake_chat_models.py
+++ b/libs/core/langchain_core/language_models/fake_chat_models.py
@@ -3,8 +3,8 @@
 import asyncio
 import re
 import time
-from collections.abc import AsyncIterator, Callable, Iterator, Sequence
-from typing import Any, Optional, Union, cast
+from collections.abc import AsyncIterator, Iterator
+from typing import Any, Callable, Optional, Sequence, Union, cast
 
 from typing_extensions import override